吉林蛟河阔叶红松林中红松的空间格局分析

本文基于阔叶红松林30hm2(500m×600m)固定监测样地,分析了红松在各林层(主林层、次林层、林下层)的空间分布、各林层之间的关联性。结果显示:(1)红松在各林层都在小尺度上呈聚集性分布,大尺度上呈随机分布;且在低林层聚集性强度高于高林层。(2)红松各林层关联性表现为主林层与次林层在小尺度上呈正相关,大尺度上关联性不显著;主林层与林下层在小尺度上呈负相关,大尺度上关联性不显著;次林层与林下层在所有尺度上呈现显著正相关。说明红松种子扩散和红松个体间竞争对空间分布起着重要作用。

Spatial Distribution Patterns and Spatial Associations of Pinus koraiensis in Broad-leaved Korean Pine Mixed Forest

A 30-ha plot (500m×600m) was established in the Jiaohe Forestry Experimental Zone Bureau of Jilin province to study the long term dynamics of a broad-leaved Korean pine mixed forest. Based the plot, Our objective was to study mechanisms of the formation of dominant species (P. korainsis) spatial distribution patterns at different layers(overstory, midstory, understory) in a broad-leaved Korean pine mixed forest. The results indicate that P. korainsis show a clumped spatial distribution at small scales and random at large scales. Higher layers tended to be randomly distributed. While lower layers tended to be aggregated at smaller scales. There was generally a positive correlation at small scales between the two species and no significant correlation at large scales. But the association varied among different layers, P. koraiensis stems showed negative correlation between overstory and understory. It is concluded that seed diffusion and individual competition play an important role in spatial distribution of P. korainsis.